Take heed of critics even when they are not fair; resist them even when they are.
The nobility of a human being is strictly independent of that of his convictions.
Think? Why think! We have computers to do that for us.
The least one can say of power is that a vocation for it is suspicious.
Hatred, for the man who is not engaged in it, is a little like the odor of garlic for one who hasn't eaten any.
It is sometimes important for science to know how to forget the things she is surest of.